EP 0051739 B1 19830824 - PROCESS FOR THE PREPARATION OF TETRAACETYLETHYLENE DIAMINE
Title (en)
PROCESS FOR THE PREPARATION OF TETRAACETYLETHYLENE DIAMINE
Publication
Application
Priority
DE 3042148 A 19801108
Abstract (en)
[origin: EP0051739A1] 1. A process for the production of N,N,N',N'-tetraacetyl ethylenediamine (TAED) by reacting N,N'-diacetyl ethylenediamine (DAED) with excess acetic anhydride, with liberation of acetic acid, removing the acetic acid formed form the reaction mixture by distillation, and recovering the TAED by crystallization, wherein a) the acetic anhydride together with tetraacetyl ethylenediamine and the constituents which are volatile at a bottoms temperature of 190 degrees C at 3 millibars is distilled off from the reaction mixture, leaving non-volatile residue, and condensed, and b) tetraacetyl ethylenediamine is recovered from the condensate by crystallization, and c) the resulting mother liquor is returned to the reaction, if necessary after distilling off the acetic acid.
IPC 1-7
CPC (source: EP)
C07C 231/08 (2013.01)
C-Set (source: EP)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0051739 A1 19820519; EP 0051739 B1 19830824; AT E4500 T1 19830915; DE 3042148 A1 19820624; DE 3160798 D1 19830929
DOCDB simple family (application)
EP 81107899 A 19811005; AT 81107899 T 19811005; DE 3042148 A 19801108; DE 3160798 T 19811005